creates a Railo function for GetRequestUrl()

functions.fld

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE func-lib PUBLIC "-//Railo//DTD CFML Function Library 1.0//EN"
	"dtd/web-cfmfunctionlibrary_1_0.dtd">
<!-- saved in /WEB-INF/railo/library/fld/ -->
<func-lib>
	<flib-version>1.00</flib-version>
	<short-name>RailoExtFunctions</short-name>
	<uri>http://www.railo.ch/functions/1_0_0</uri>
	<display-name>Railo Extension Function Library</display-name>
	<description>Adds Functions to Railo</description>
	<function>
		<name>GetRequestUrl</name>
		<class>net.twentyonesolutions.railo.functions.GetRequestUrl</class>
		<description>returns the current request's full URL</description>
		<return>
			<type>string</type>
		</return>
	</function>
</func-lib>

GetRequestUrl.java

package net.twentyonesolutions.railo.functions;

import javax.servlet.http.HttpServletRequest;
import railo.loader.engine.CFMLEngineFactory;
import railo.runtime.PageContext;
import railo.runtime.exp.PageException;
import railo.runtime.ext.function.Function;


/** creates a Railo function for GetRequestUrl() (requires function definition file of type .fld) */
public class GetRequestUrl implements Function {
    
    public static final String SUBSTR_PORT_HTTPS  = ":443/";
    public static final String SUBSTR_PORT_HTTP   = ":80/";
    
    /** handles call to the function without arguments
     * 
    * @param pc pageContext of the current request
    * @throws PageException 
    */
    public static String call( PageContext pc ) throws PageException {

        String result = "";
        
        try {

            HttpServletRequest req = (HttpServletRequest) pc.getRequest();
            
            result = req.getRequestURL().toString();
            
            result = removeDefaultPort( result );
            
            String queryString = req.getQueryString();
            
            if ( queryString != null && !queryString.isEmpty() )
                result = result + "?" + queryString;
            
        } catch ( Exception ex ) {

            throw CFMLEngineFactory.getInstance().getCastUtil().toPageException( ex );
        }
        
        return result;
    }
    
    
    /**
     * removes the :443 from https URLs or the :80 from http URLs
     * 
     * @param url
     * @return 
     */
    public static String removeDefaultPort( String url ) {
        
        String result = url;
        
        String sb6 = url.substring( 0, 6 ).toLowerCase();

        int posSla3 = url.indexOf( "/", 8 );
        
        if ( posSla3 > -1 ) {

            String sPort = ":-1/";
            
            if ( sb6.equals( "https:" ) ) {

                sPort = SUBSTR_PORT_HTTPS;
            } else if ( sb6.equals( "http:/" ) ) {

                sPort = SUBSTR_PORT_HTTP;
            }
            
            int posPort = url.indexOf( sPort );
            
            if ( posPort > -1 && posPort < posSla3 ) {
                
                result = url.substring( 0, posPort ) + url.substring( posPort + sPort.length() - 1 );
            }
        }
        
        return result;
    }
    
    
    /** test method */
    public static void main(String[] args) {
        
        String[] urls = { "http://www.google.com:80/", "https://www.google.com:443/", 
                "http://www.google.com:80/search?q=abc", "https://www.google.com:443/search?q=abc",
                "http://www.google.com:8080/search?q=abc", "https://www.google.com/search?q=abc" };
        
        for ( String u : urls )
            System.out.println("u: " + u + "\t>>\t" + removeDefaultPort(u));
    }
}